Wireless-telephone system.



M. B. JOHNSON.- WIRELESS TELEPHONE SYSTEM. AB PLIOATION FILED OOT. 6,1910.

996 090, Patented June 27, 1911.

ATTORNE V vmunron nEnnAYsJonnsoN, or sen anronlo'rnxas.

WIRELESS-TELEPHONE SYSTEM.

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Specification (if-Letters Patent. Patented JHIMB 27, 1911.

Application filed October 6,1910. Serial No 585,544.

To all whom it may concern:

Be it known that I, [MAURICE BnnNaYs Johnson, a citizen of the United States, and a resident of San Antonio, in the county of Bexar and State of Texas, have made and invented certain new and useful Improve ments in Hreless-Teleph ine Systems, of which the following is a specification. My invention relates to wireless telephone 13 systems, of-the type whereincurrent travels through the ground, and the object thereof is to provide an improved wirelesstelephone system having signaling and talkingcirceiver and transmitter alternately as a person listens or talks as has frequently been the case, the talkingcircuit, when established, being in condition for both receiving and transmitting messages without change.

My lnvention is illustrated in the accompany-ing drawings anddescribed in the .fol-' owin s ecification and the distin uishin 7 b b features thereof are particularly claimed in the'clauses-of theclaim.

In the drawing, the figure illustrates in diagram the preferred embodiment of. my

invention.

A-and B are two wireless telephonesta- .-tions, separated a considerable distance, from one another communication between. .the two bemg established through theground. Referring to the station A, l is an electric bell, 2, a two pole switch, 3 a single pole switch, 4 a battery of any form, which battery may be replaced by any other suitable source of electricity, and 5 is a telephone instrument of any suitable form, the instru- Inent shown being of the type which. has the receiver and transmitter in series, with 'a hookswitch for cutting out the receiver and transmitter and making a signaling circuit when the receiver is hung up. The instruments thus far described are connected with the ground by two ground Wires 6, 7, these being connected to the ground at some considerable distance apart, as is usual in such systems. Terminals such 5 as binding posts 8, 9, 10 are employed for convenience in connecting the telephone in strument 5, in circuit with the-remaining o'rtion of the apparatus, these, however, be-

.lng provided so that a telephone instrumentv 5 of common form may be used, the posts '8,

, 'cuits so arranged that it will be unnecessary to operate a switch to connect 1n the re- 9 being bridged by a link 14c, to cut out the signaling circuit of the instrument.

11 is a wire connecting the switch 2 with the terminal 9, 12 is a wire connecting the switch'2 and the binding post 10, and 13 is a wire connecting the binding post 10 with the battery 4. i

The instruments and circuits in the remote station B are similar to the instruments and circuits thus'far described for the station A, and without specifically referring to each element of the station B, prime numbers such as 1", 2 etc, are used at B to designate instruments and circuits similar to those above described as in the station A.

The switch arms of the switches 2, 2 are normally in their upper positions, and the switches 3, 3 are normally open. Such being the case, an operator at A signals the station B by moving the switch arm of the switch 2 into its lower position and closing the switch 3, whereupon current will flow from battery 4 through switch 3 and wire 7 toground; to the distant station B, through ground wire 6 link 14, and wire 11 through switch 2 bell l 'and ground connection 7 to ground; back through the earth to the station A, through the ground connection 6, link 14 and wire 11 through switch 2, wires 12, and 13 to the battery't, thus completing the circuit and ringing bell 1 in the station B. During the signaling step above outlined and also when-a signal is sent from the station B to the station A in a manner obvious from the above description, the telephone instruments 5, 5 are cut out by means of the-switch con trolled by the hook. upon which the receiver normally hangs, so that current may not flow through the. telephone instruments while the instruments are used for signaling purposes. above, the operator at the station B will close the switch 3 and place the arm of the switch 2 in its middle position, thus cutting out the bell 1 and take down the receiver of the telephone, and, the operator in the'station A having done likewise, a talking circuit is established as follows: from battery 4 through switch-3 and wire 7 to Upon receiving the signal as ground; through the ground to the distant desire to secureby Letters Patenb- In a Wireless telephone system, a bell; a' battery; two ground connections; a two pole switch 2 adapted to connect either said or said battery, in circuit with said ound connections, or to break both said circuits;

Copies of this patent may be obtained fonfiye cents each, by addressing th e Washingtom-D. G.

taken from their hooks.

bell,

a switch 3 for controlling said last named 15 circuit; and a telephone instrument, the same being connected with said system but the circult through which is normally broken. e r

Signed at New York, borough of Manhattan, in the county of New York and State of New York, this 30th day of September,

MAURICE. mums JOHNSON.

Witnessesi.

- A. V. WALSH,

H. M. WHI E,

Commissioner of Patents, 

